COMPOSICIONES CURABLES EN PRESENCIA DE HUMEDAD Y NO FILAMENTOSAS

LA INVENCION SE REFIERE A UNA MEZCLA DE POLIMEROS HIDROXI FUNCIONALES QUE SE PUEDEN USAR PARA FORMAR PREPOLIMEROS DE ISOCIANATO QUE NO FORMAN HILOS O PELOS A LA TEMPERATURA DE APLICACION. EJEMPLOS DE MEZCLAS ADECUADAS PARA ESTOS POLIMEROS SON: 1) MEZCLAS DE POLIESTERES LINEALES QUE COMPRENDEN UN PRIMERO Y SEGUNDO POLIESTER QUE SON CADA UNO EL PRODUCTO DE REACCION DE UN POLIOL Y UN POLIACIDO, CON DISTINTOS NUMEROS DE PORCIONES METILENICAS; 2) UNA MEZCLA DE AL MENOS UN POLIESTER NO LINEAL Y UNO LINEAL SELECCIONADO EL PRIMERO ENTRE LOS POLIADIPATOS DE NEOPENTILO, PROPILENO Y CICLOHEXANODIMETILO Y EL SEGUNDO DE POLIADIPATO DE ETILENO, POLISUCCINATO DE BUTILENO Y POLISEBACATO DE HEXAMETILENO, CON LA CONDICION DE QUE CUANDO EL POLIESTER LINEAL ES POLISEBACATO DE HEXAMETILENO EL NO LINEAL ES POLIADIPATO DE NEOPENTILO O DE PROPILENO; Y 3) UNA MEZCLA DE POLI EPSILON - CAPROLACTONA Y AL MENOS UN POLIESTER LINEAL SELECCIONADO DEL GRUPO FORMADO POR POLIADIPATO DE ETILENO Y POLISUCCINATOS DE ETILENOY DE BUTILENO. A mixture of hydroxy functional polymers which can be used to form isocyanate prepolymers which are non-hairing at application temperature are disclosed. Examples of suitable mixtures of hydroxy functional polymers that can be used to form the prepolymers are: (1) linear polyester blends, comprising a first and second polyester wherein each polyester is the reaction product of a polyol and a polyacid, wherein a + b < or = 4, c + d > or = 6 a + b > 4 or or = 10 a + b > 6 or or = 12 herein a is the number of methylene moieties in the polyol used to form the first polyester, b is the number of methylene moieties in the polyacid used to form the first polyester, c is the number of methylene moieties in the polyol used to form the second polyester of the blend, d is the number of methylene moieties in the polyacid used to form the second polyester of the blend; and (2) a blend of at least one non-linear polyester and one linear polyester, wherein the non-linear polyester is selected from the group consisting of polyneopentyl adipate, polypropylene adipate and polycyclohexanedimethyl adipate, and the linear polyester is selected from the group consisting of polyethylene adipate, polybutylene succinate, and polyhexamethylene sebacate, provided that when the linear polyester is polyhexamethylene sebacate, the non-linear polyester is polyneopentyl adipate or polypropylene adipate; and (3) a blend of poly epsilon -caprolactone and at least